When we round a number to the tens place we look to our ones place to tell us if we round up or down. If the number in our ones place is  or greater, we round up. If the number in the ones place is  or less, we round down. When we round up, the number in the tens place increases by . The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same. When we round down, the number in the tens place stays the same. The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same.

In this case,  is less than  so our rounded number is 

When we round a number to the tens place we look to our ones place to tell us if we round up or down. If the number in our ones place is  or greater, we round up. If the number in the ones place is  or less, we round down. When we round up, the number in the tens place increases by . The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same. When we round down, the number in the tens place stays the same. The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same.

In this case,  is less than  so our rounded number is 

When we round a number to the tens place we look to our ones place to tell us if we round up or down. If the number in our ones place is  or greater, we round up. If the number in the ones place is  or less, we round down. When we round up, the number in the tens place increases by . The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same. When we round down, the number in the tens place stays the same. The numbers to the right of the tens place become  and the numbers to the left of the tens place stay the same.

In this case,  is less than  so our rounded number is 

To solve for the unknown value, the denominators must be the same.

Reconvert the one whole to seven parts over seven. Once there is a common denominator, subtract the numerators to get the final answer.

To find a whole, add all the known parts. Then, find the one that is missing. Think:

 (part) plus what (part) equals  (whole)?

The missing part is .

 gummy bears will need to be divided into  equal parts. If you take  away from  and give  to each sibling, Halley has  gummy bears leftover. Even though the siblings have an equal amount ( gummy bear each), the total number () hasn't been completely divided.

If you were to repeat this process, taking  from the total and distributing  to each sibling until the total as , each sibling would have a total of  gummy bears.

 because of the digit in the hundredths place.  which makes 

 because of the digit in the hundredths place.  which makes 

 because of the digit in the hundredths place.  which makes 

 because of the digit in the hundredths place.  which makes